I've had this light come on and diagnosed via Carista as P0132 - 02 Sensor Circuit High Voltage Bank 1 Sensor 1. It also comes up with 18115 - O2 Sensor Circ.,Bank1-Sensor1: High Voltage which I assume means the same thing but within the basic OBD functionality.

As such I have procured two new sensors for Banks 1 & 2 as the car is at just over 95K miles so though it best te replace them both.

My queriy is - I believe the Sensors are located before the Catalytic converter. If so exactly where are they located within the engine bay. I can see what I think is one, just behind the aluminium cover that sits under the plastic engine cover approximately where the arrow is, but cannot see the other one. Is it likely to be under the aluminium cover?
S5 engine bay.jpg

Any assistance or images most ghratefully appreciated as I think I am capable of changing them myself. I have recently changed the Oil Separator and PCV hose fitting as a result of other issues

Thanks in advance